Hey guys . . . need a little help here again

Anyhow i've been using DT's Live Phytoplankton for atleast a year now and my tank is looking amazing . . . I've just added two clams in my tank and am wondering which is a better food supplement for my filter feeders (incl. inverts) Someone suggested me with Tahitian Blend and I'm just wondering if anyone out there has tried both Tahitian Blend or Dt's and in your opinion which works best? Any info would be helpful
Cheers-